DRM - the BBC World Service distribution chain
نویسنده
چکیده
At the basic RF-channel level, DRM shares many characteristics with other modern systems such as DVB-T and DAB. It utilises Coded Orthogonal Frequency Division Multiplexing (COFDM) [1][2] to combat noise, narrowband fading and multipath. Broadcasts can be synchronized to support Single-Frequency Networks (SFNs) and Multi-Frequency Networks (MFNs). One DRM service normally occupies one AM channel. Alternative modes are available that use half a channel or two adjacent channels to support in-channel simulcast or enhanced audio services.
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